785629640 has 16 divisors (see below), whose sum is σ = 1767666780. Its totient is φ = 314251840.

The previous prime is 785629601. The next prime is 785629643. The reversal of 785629640 is 46926587.

785629640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 783664036 + 1965604 = 27994^2 + 1402^2 .

It is not an unprimeable number, because it can be changed into a prime (785629643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9820331 + ... + 9820410.

Almost surely, 2^785629640 is an apocalyptic number.

It is an amenable number.

785629640 is an abundant number, since it is smaller than the sum of its proper divisors (982037140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

785629640 is a wasteful number, since it uses less digits than its factorization.

785629640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640752 (or 19640748 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 785629640 is about 28029.0856076327. The cubic root of 785629640 is about 922.7257066766.

The spelling of 785629640 in words is "seven hundred eighty-five million, six hundred twenty-nine thousand, six hundred forty".